Table 1.

Details of farm management and data collected from nine groups of cattle on seven dairy farms in Cornwall in Summer and Autumn 2018. Details include breed of cattle, grazing management, milking routine, group sizes, number of collars with GPS and proximity sensors that were deployed, and data quality.

Deployment name	Start month of study	Breed of cattle	Source of replacement cows	Group	Calving system	Cow access to farm locations		Grazing type	No. milkings per day	No. cows in group		Study Period (days)	No. cows with complete proximity data	Percentage of the group with data (of collars deployed)
						Buildings	Pasture			Start	End
Night-housed	Oct-18	Holstein Friesian	Multiple source farms	Milking	All year round	Milking and night	Day	Rotational grazing	2	98	97	6.77	87	88.8
Strip-grazed	Aug-18	Ayrshire	Home-bred	Milking	All year round	Milking	Day and night	Strip grazing	2	52	54	6.83	44	84.6
Free	Aug-18	Holstein Friesian	Home-bred	Milking	All year round	Access at all times	Access at all times	Free roam of pastures	Automated milking system	60	60	6.85	50	83.3
Rotation 1a	Aug-18	Holstein Friesian / Jersey cross	Home-bred	Milking	Autumn calving	Milking	Day and night	Rotational grazing	1	80	96	6.77	64	80.0
Rotation 1b	Oct-18			Milking		Milking and access at all times	Day and night	Rotational grazing	2	98	112	6.79	87	88.8
Dry	Sep-18	Holstein Friesian	Multiple source farms	Dry	All year round	No access	Day and night	Set stocking	0	33	32	6.76	22	59.5
Housed	Sep-18			Milking		Day and night	No access	NA	2	111	106	6.76	100	90.1
Rotation 2	Oct-18	Holstein Friesian	Home-bred	Milking	All year round	Milking	Day and night	Rotational grazing	2	175	181	7.04	95	53.7
Stable	Sep-18	Mixed	Multiple source farms	All cows	Spring calving	Milking	Day and night	Rotational grazing	1	59	59	6.84	37	64.9
									Mean:	85	89	6.82	65	77.1